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  Piece

  Decrypts of Japanese army and army air force messages

  Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1944 Sep 01-1945 Apr 20

  Reference

  HW 52/38

• Catalogue level

  Piece

  Analytic notes on the 8FN group (Moscow to Comintern agents abroad): GC and CS request...

  Analytic notes on the 8FN group (Moscow to Comintern agents abroad): GC and CS request for DF bearings on 8FN group; two Waddington station reports on 'Old 8FN' activity; Chatham station report on 3SG/8FD.

  Held by

  The National Archives, Kew

  Date

  1933 Dec

  Reference

  HW 17/38

• Catalogue level

  Piece

  Co-operation with Russia on German naval communications

  Co-operation with Russia on German naval communications

  Held by

  The National Archives, Kew

  Date

  1942 Jun 01 - 1942 Aug 31

  Reference

  HW 61/38

• Catalogue level

  Piece

  Security of electronic communications

  Security of electronic communications

  Held by

  Creating government department or its successor

  Date

  1954 Feb-1955 May

  Reference

  HW 9/38

• Catalogue level

  Piece

  Resubordination of GCCS: ministerial correspondence reflecting transfer of GCCS from...

  Resubordination of GCCS: ministerial correspondence reflecting transfer of GCCS from Admiralty to Foreign Office on Aug 21

  Held by

  The National Archives, Kew

  Date

  1921

  Reference

  HW 3/38

• Catalogue level

  Piece

  Commercial reports

  Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Aug 01-1940 Aug 03

  Reference

  HW 29/38

• Catalogue level

  Piece

  Security

  Security

  Held by

  The National Archives, Kew

  Date

  1942 Feb 24 - 1943 Dec 11

  Reference

  HW 64/38

• Catalogue level

  Piece

  American Liaison Letters. Bodsworth letters BWX/2-67 (Nos. 1, 13, 53, 59-66 not listed),...

  American Liaison Letters.Bodsworth letters BWX/2-67 (Nos. 1, 13, 53, 59-66 not listed), 29/3/1945-20/12/1945. 20/12/1945 letter encloses photographs of OP-20-G Staff and Sections. See Piece 112 for the photographs. Letters to Cmdr. C.N.R. Barham R.N.…

  Held by

  The National Archives, Kew

  Date

  1945 Mar 29-1945 Dec 03

  Reference

  HW 8/38

• Catalogue level

  Piece

  List of GCCS sections by hut and room number and with associated senior personnel;...

  List of GCCS sections by hut and room number and with associated senior personnel; report for C and EWT from AGD on current position of exploitation of diplomatic cyphers world-wide, AGD supports MEW request for more raw Sigint from Canada; Type X Si…

  Held by

  The National Archives, Kew

  Date

  1942 May 21-31

  Reference

  HW 14/38

• Catalogue level

  Piece

  Reports in the series QT/3501 to QT/4000.

  Reports in the series QT/3501 to QT/4000.

  Held by

  The National Archives

  Date

  1942 Oct 14-1942 Oct 21

  Reference

  HW 20/38

• Catalogue level

  Piece

  Japanese diplomatic messages between Ministry of Foreign Affairs, Tokyo, and Japanese...

  Japanese diplomatic messages between Ministry of Foreign Affairs, Tokyo, and Japanese diplomatic posts abroad, mainly those in Kabul and the Vatican. Messages were mainly of intelligence and security interest and Section V (Roman Five) of MI6 was the…

  Held by

  The National Archives, Kew

  Date

  1943 Jul 05-1944 Nov 09

  Reference

  HW 38/1

• Catalogue level

  Piece

  Commercial messages passed over diplomatic channels

  Commercial messages passed over diplomatic channels

  Held by

  The National Archives, Kew

  Date

  1945 Apr 01-1945 Apr 30

  Reference

  HW 32/38

• Catalogue level

  Piece

  Italian Armistice Commission active in French North Africa. More on Japanese operations...

  Italian Armistice Commission active in French North Africa. More on Japanese operations in Malaya, the Philippines and Dutch East Indies; US air raids on Japan. Italian aircraft provide convoy protection

  Held by

  The National Archives, Kew

  Date

  1942 Mar 25-1942 May 13

  Reference

  HW 21/38

• Catalogue level

  Piece

  The Battle of the Atlantic Operational Intelligence Centre Special Summary. This...

  The Battle of the Atlantic Operational Intelligence Centre Special Summary. This is an account of the use of Special Intelligence (Signals intellignence derived from the reading of high grade German cyphers) in the Battle of the Atlantic, written by …

  Held by

  The National Archives, Kew

  Date

  1939 - 1945

  Reference

  HW 11/38

• Catalogue level

  Piece

  RAF Middle East summaries (second series) describing enemy operational activity,...

  RAF Middle East summaries (second series) describing enemy operational activity, transport movements and fuel supply on all fronts

  Held by

  The National Archives, Kew

  Date

  1943 Jan 01-1943 Apr 09

  Reference

  HW 41/38

• Catalogue level

  Piece

  German air force grid system

  German air force grid system

  Held by

  The National Archives, Kew

  Date

  1941 Mar 22

  Reference

  HW 51/38

• Catalogue level

  Piece

  GRU (Soviet Intelligence) Military Attaché Traffic: Moscow to Paris, France. (Described...

  GRU (Soviet Intelligence) Military Attaché Traffic: Moscow to Paris, France. (Described at item level)

  Held by

  The National Archives, Kew

  Date

  1940 Apr 11-1940 Apr 28

  Reference

  HW 15/38

• Catalogue level

  Piece

  Japanese naval decrypts

  Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Oct 18-1943 Oct 21

  Reference

  HW 23/38

• Catalogue level

  Piece

  Decrypts of all other GP codes other than No 3, issued as BP daily reports in GPD...

  Decrypts of all other GP codes other than No 3, issued as BP daily reports in GPD series

  Held by

  The National Archives, Kew

  Date

  1943 July-Nov

  Reference

  HW 16/38

• Catalogue level

  Piece

  Some Italian Y Service reports

  Some Italian Y Service reports

  Held by

  The National Archives, Kew

  Date

  Nov 13 1941-Nov 22 1941

  Reference

  HW 5/38